Re: Marshall JCM 800 4210
Had one...nice amp..
Make sure ya put El34s in it and rebias it, if it came with 6550s.
I ran a TS/DS/Rat/SOD/Boss HM/Ibanez Distortion Charger/ MXR D+ pedal into it at various times. All worked pretty well.
DS-1 worked for Gary Moore and his Marshalls...makes a great boost...not so good a s standalone.
TS9 is nice and smooth, but the mid honk bugs some people and you'll cut off some low end.
RAT was prolly my least fave. A little too thin and grainy sounding for me, but others love them.
SOD is prolly the best all around. A little fatter/thicker than a TS, but also smooth.
HM pedal worked very well too...sounds HUGE...but buzzy.
Distortion Charger I actually ran on the clean channel for late night practice. Very cool pedal..I'd like to find another someday. Sounds like a little Marshall stack
MXR is a strange beast. People love it or hate it. It's fuzzy, and grainy. But thats what Dave and Adrian used 99% of the time (Adrian also used a TS). Worked well for them.
However the gain channel on that amp has more than enough crunch for classic maiden chordwork if you've got any volume on the thing. Any of those peds would make a nice goose for lead work.